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Threat Group Cards: A Threat Actor Encyclopedia

Tool: Rifdoor

Names	Rifdoor
Category	Malware
Type	Backdoor
Description	(AhnLab) Rifdoor was first discovered in November 2015, and it remained active until early 2016. A Rifdoor variant was used to attack SEOUL ADEX exhibitors in 2015 and was found in the hacking incidents of security companies in early 2016. When it enters the system, Rifdoor generates a file by adding garbage data to the 4 bytes of the last part of the file. Therefore, since the hash value changes each time the system is infected, the malware cannot be found in the system with a simple hash value.
Information	<https://global.ahnlab.com/global/upload/download/techreport/%5BAhnLab%5DAndariel_a_Subgroup_of_Lazarus%20(3).pdf> <https://www.carbonblack.com/2020/04/16/vmware-carbon-black-tau-threat-analysis-the-evolution-of-lazarus/>
MITRE ATT&CK	<https://attack.mitre.org/software/S0433/>
Malpedia	<https://malpedia.caad.fkie.fraunhofer.de/details/win.rifdoor>
AlienVault OTX	<https://otx.alienvault.com/browse/pulses?q=tag:Rifdoor>

Last change to this tool card: 30 December 2022

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All groups using tool Rifdoor

Changed	Name	Country	Observed
APT groups
	Lazarus Group, Hidden Cobra, Labyrinth Chollima		2007-Feb 2024

1 group listed (1 APT, 0 other, 0 unknown)

Digital Service Security Center
Electronic Transactions Development Agency

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